Alisa og Claus Clausen on mon 2 apr 01
On the subject of A.P. Green cement, I found these recipes relevant =
perhaps to the person who has a lot of this material:
In a description by Richard Behrens of "using cement in glazes" he
lists these recipes. I do not know if they are usuable witht the =
material you have, as Behrens used Portland Cement, but that is builidng =
cement and maybe what you have is also? He says in a properly =
compounded glaze, the cement behaves like a frit, natural or =
manufactured. Looking at the unity formula of cement, it is apparent =
that it a basically a high calcium, low silica frit. Uusally it also a =
high alumina type frit. I thought this informaton was interseting.
Cement glaze cone 04
Portland Cement 17,0
Frit 25 (Pemco) 78,7
Flint 4,3
A clear, light yellow glaze
Cement Glaze cone 4
Portland Cement 29,3
Frit 25 57,6
Flint 13,1
This is a clear yellow glaze. Color addtions as follows:
5,0 Red iron ox. for yellow
3,0 Copper Carb. for turquoise
3,0 Manganese Carb. for brown purple
3,0 Green chrome ox. for opage deep green
2,5 Red Iron Oxide plus 1,5 Copper Carb. for bright green
2,5 Red iron ox. plus 1,5 Green chrome ox. for green
1,5 Copper oxide plus 1,5 Manganese carb. for a bluish green
As usual, please use the appropriate health precautions when handling =
these materials.
Cement glaze cone 9
Porland Cement 21,1
Frit 25 25,1
Zinc oxide 2,1
Whiting 2,7
Flint 49,0
this cone 9 glaze is an opaque white with a stipple like texture.
Wonder if one could use that as a base under a more fluid glaze to give =
texture. =20
Try it Ababi?
Best regards,
Alisa in Denmark
Alisa Clausen
Varn=E6svej 171, DK6200 Aabenraa
Danmark
t. 45 7461 3641
Aliskin@mail.dk
Alisa's Pot Shop
Skolevej 3, DK6200, Aabenraa
Danmark
t. 20246640
Potshop@mail.dk =20
Ababi on tue 3 apr 01
The Cement as Behrens writes, is a frit. A bit problematic as it is do and
dump.
I tried a several glazes.
I think I took one to my school where they fired to 1240C and it melted the
way it was, not sure. My good friend Yehada Koren told me about this
subject, he had, to glaze a cement wall, if my memory was right, he did it
with a torch, the kind with use with raku in order to melt the concrete and
receive a glaze on the outside. I can ask him again if you are interested.
Anyway I tried several recipes. In raku was kind of lichens, but some pieces
of the test tile flew away. In 1060 +frit and "others" was just an ugly
glaze. The only success was in ^6, 1220C. I wait for my next photography
day to add it to my humble site. The glaze is kind of yellowish reminds me
of a lithium glaze I used before. do not remember the name.Where it is
thicker, it makes my favorite claybobdy buff mottled, very special, like it
has many small dots. For me now it is a glaze, to be used when it is needed.
There is another thing I saw once a piece that was brushed with wet cement
and fired. I saw it before understood enough ceramics, so I cannot tell you
to what temperature it was fired
Here again my secret recipe: I made it using Insight
Ababi's concrete for ^6
=======================
Portland Cement..... 22.00 22.00%
MAGNESIUM CARBONATE. 8.00 8.00%
BORAX............... 15.00 15.00%
ENGLISH KAOLIN(Puraf 20.00 20.00%
QUARTZ.............. 15.00 15.00%
CRYOLITE............ 20.00 20.00%
========
100.00
As it is all "use and dump" I used the borax as a main flux
The Ananlysis of Portlad cement( we call it Samson in Denemark you might
call it Viking cement)
Cao 62.275%
Fe2O3 2.113%
MgO 2.215%
Al2O3 7.549%
SiO2 22.647%
LOI 3.200%
Did you see that LOI is in all the recpies?
Where do you buy it?
Ababi Sharon
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/
Original Message -----
From: "Alisa og Claus Clausen"
To:
Sent: Monday, April 02, 2001 8:57 PM
Subject: Cement glazes
On the subject of A.P. Green cement, I found these recipes relevant perhaps
to the person who has a lot of this material:
In a description by Richard Behrens of "using cement in glazes" he
lists these recipes. I do not know if they are usuable witht the material
you have, as Behrens used Portland Cement, but that is builidng cement and
maybe what you have is also? He says in a properly compounded glaze, the
cement behaves like a frit, natural or manufactured. Looking at the unity
formula of cement, it is apparent that it a basically a high calcium, low
silica frit. Uusally it also a high alumina type frit. I thought this
informaton was interseting.
Cement glaze cone 04
Portland Cement 17,0
Frit 25 (Pemco) 78,7
Flint 4,3
A clear, light yellow glaze
Cement Glaze cone 4
Portland Cement 29,3
Frit 25 57,6
Flint 13,1
This is a clear yellow glaze. Color addtions as follows:
5,0 Red iron ox. for yellow
3,0 Copper Carb. for turquoise
3,0 Manganese Carb. for brown purple
3,0 Green chrome ox. for opage deep green
2,5 Red Iron Oxide plus 1,5 Copper Carb. for bright green
2,5 Red iron ox. plus 1,5 Green chrome ox. for green
1,5 Copper oxide plus 1,5 Manganese carb. for a bluish green
As usual, please use the appropriate health precautions when handling these
materials.
Cement glaze cone 9
Porland Cement 21,1
Frit 25 25,1
Zinc oxide 2,1
Whiting 2,7
Flint 49,0
this cone 9 glaze is an opaque white with a stipple like texture.
Wonder if one could use that as a base under a more fluid glaze to give
texture.
Try it Ababi?
Best regards,
Alisa in Denmark
Alisa Clausen
Varnęsvej 171, DK6200 Aabenraa
Danmark
t. 45 7461 3641
Aliskin@mail.dk
Alisa's Pot Shop
Skolevej 3, DK6200, Aabenraa
Danmark
t. 20246640
Potshop@mail.dk
____________________________________________________________________________
__
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
| |
|
